LinuxQuestions.org - No sound during Flash video playback from within Iceweasel 3

I am running this version of Iceweasel on 32-bit Debian testing:

Code:

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.7) Gecko/2009030814 Iceweasel/3.0.7 (Debian-3.0.7-1)

I ran gnome-sound-properties and was able to press all of the Test buttons and hear sound come out, so some form of sound is working in my system.

Here is the relevant section of the "about: plugins" page from within the browser:

Code:

Shockwave Flash



    File name: libflashplayer.so

    Shockwave Flash 10.0 r22



MIME Type        Description        Suffixes        Enabled

application/x-shockwave-flash        Shockwave Flash        swf        Yes

application/futuresplash        FutureSplash Player        spl        Yes

That was due to downloading and installing the flash player directly from Adobe using the .tar.gz file that they provide.

Reading another post led me to try installing the libesd-alsa0 package, and that removed the libesd0 package. But that did not improve sound playback at all.

I read a related post about OSS 4 and am a bit confused with the variations of sound "subsystem" (if that is what you call it/them). What are these things? ALSA, ESD, and OSS? Which ones are in use by the flash player or by Iceweasel, or both, for playing sound from the flash video?

Any assistance will be greatly appreciated.

bg